True. There were few (no other?) options for routers back then. I have fond memories of locking myself out of an ISP's core router then having to power cycle it.
When they started making smallish dedicated routers I remember opening one to see a dodgy backplane and a number of big boards plugged in held up only by minimal slides. The minute it got hot (which it did because no air management) those boards sagged in the middle and it just looked slapdash. The 3Com equivalents were always better built but Cisco had such mindshare it didn’t matter the products were a bit crap